AMD Socket-939 Dual Core Overclocking Database, Dual core Athlon64/FX/Opteron
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 Jun 21 2007, 04:42 PM
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Senior Member
3,807 posts Joined: Jan 2003   
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QUOTE(uzairi @ Jun 21 2007, 04:04 PM) I dont think so, these guys are running their BH5's with 3.2v including Gsan. i just googled out tat high vdimm with low vcore will kill the mem controller... mayb just some proc and not all la...  |
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Jun 21 2007, 09:46 PM
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Senior Member
6,744 posts Joined: Jan 2003 From: World Wide Web Status: Banned
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Is it ? Then Gsan should know about this.. he's using stock vcore and high vdimm for his rig.
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Jun 21 2007, 11:08 PM
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Senior Member
3,807 posts Joined: Jan 2003
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stock vcore is 1.35v right?
QUOTE uOpt makes a nice reference table using the info provided by Micutzu : "ETA: this is at default drive strength. Higher drive strength will require less differential for safety Vdimm - Vcpu(min) ---------------------------- 2.9 V --- 1.12 V (min) 3.0 V --- 1.17 V (min) 3.1 V --- 1.22 V (min) 3.2 V --- 1.28 V (min) 3.3 V --- 1.33 V (min) 3.4 V --- 1.37 V (min) 3.5 V --- 1.42 V (min) 3.6 V --- 1.47 V (min) 3.7 V --- 1.53 V (min) 3.8 V --- 1.58 V (min) 3.9 V --- 1.62 V (min) 4.0 V --- 1.67 V (min) Absolutely NO WARRANTY for this. http://www.madshrimps.be/vbulletin/f22/run...n-64-cpu-20584/ |
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Jun 22 2007, 12:59 AM
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Senior Member
2,471 posts Joined: Jan 2003 
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regarding this issue, I knew it from XS before, but so far I have not experience it, maybe it will happening one day later and atm I limited the vdimm up to 3.3v
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Jun 22 2007, 07:05 AM
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Elite
14,576 posts Joined: May 2006 From: Sarawak
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QUOTE(amyhs99 @ Jun 21 2007, 11:08 PM) Ya, I knew about this when I was trying to underclock my 3500+ previously.The general formula is vdimm/2 - vcore = result. The result should not be more than 0.325v. e.g. 2.9v/2 (=1.45) - 1.125 (vcore) = 0.325 So, a vcore of 1.125v is the absolute minimum..... |
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Jun 23 2007, 10:46 AM
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Senior Member
2,471 posts Joined: Jan 2003
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well, the LCBQE 0648SPMW finally can prime 2.7GHz @ stock vcore stable with the FFT is from 8k to 512k. at first, I tried 2.7GHz @ stock vcore but it prime failed within 3 hours and pump to 1.375v it still prime failed within 10+ hours provided the vdimm is 3.2v. the reason I set vdimm to 3.2v because the others X2 running 2.7GHz with 180MHz divider need this vdimm. but for this X2, it need 3.3v to prime it stable and I believe that FFT more than 64k is more stress to memory.
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Jun 23 2007, 03:55 PM
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Elite
14,576 posts Joined: May 2006 From: Sarawak
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QUOTE(gsan @ Jun 23 2007, 10:46 AM) well, the LCBQE 0648SPMW finally can prime 2.7GHz @ stock vcore stable with the FFT is from 8k to 512k. at first, I tried 2.7GHz @ stock vcore but it prime failed within 3 hours and pump to 1.375v it still prime failed within 10+ hours provided the vdimm is 3.2v. the reason I set vdimm to 3.2v because the others X2 running 2.7GHz with 180MHz divider need this vdimm. but for this X2, it need 3.3v to prime it stable and I believe that FFT more than 64k is more stress to memory. You mean to say that vdimm also affects max CPU OC speed?  |
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Jun 23 2007, 04:15 PM
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Senior Member
2,471 posts Joined: Jan 2003
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QUOTE(kmarc @ Jun 23 2007, 03:55 PM) You mean to say that vdimm also affects max CPU OC speed? nope, what I want to point out is FFT more than 64k is stressing memory than cpu. |
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Jun 23 2007, 04:22 PM
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Elite
14,576 posts Joined: May 2006 From: Sarawak
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QUOTE(gsan @ Jun 23 2007, 04:15 PM) nope, what I want to point out is FFT more than 64k is stressing memory than cpu. Ya, that's what I was thinking. Everytime the FFT is high e.g. 380k, the CPU temperature drops. This probably means that it is not stressed that much.So, the recommendation of setting the FFT to 8 - 512k is actually to stress the whole rig right? I thought initially it was solely for the CPU....  |
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Jun 23 2007, 04:24 PM
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Senior Member
2,471 posts Joined: Jan 2003
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QUOTE(kmarc @ Jun 23 2007, 04:22 PM) Ya, that's what I was thinking. Everytime the FFT is high e.g. 380k, the CPU temperature drops. This probably means that it is not stressed that much. for testing whole system stability, use blend test, FFT 8k-4096kSo, the recommendation of setting the FFT to 8 - 512k is actually to stress the whole rig right? I thought initially it was solely for the CPU.... |
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Jun 23 2007, 04:40 PM
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Elite
14,576 posts Joined: May 2006 From: Sarawak
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QUOTE(gsan @ Jun 23 2007, 04:24 PM) for testing whole system stability, use blend test, FFT 8k-4096k OIC, thx. Anway, I'm almost finished with 939. Going to go 775 soon!  |
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Jun 24 2007, 09:25 PM
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Senior Member
6,744 posts Joined: Jan 2003 From: World Wide Web Status: Banned
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QUOTE(gsan @ Jun 23 2007, 10:46 AM) well, the LCBQE 0648SPMW finally can prime 2.7GHz @ stock vcore stable with the FFT is from 8k to 512k. at first, I tried 2.7GHz @ stock vcore but it prime failed within 3 hours and pump to 1.375v it still prime failed within 10+ hours provided the vdimm is 3.2v. the reason I set vdimm to 3.2v because the others X2 running 2.7GHz with 180MHz divider need this vdimm. but for this X2, it need 3.3v to prime it stable and I believe that FFT more than 64k is more stress to memory.
, currently im using 2.7v for my tccd. Should i increase the vdimm ?QUOTE(kmarc @ Jun 23 2007, 04:40 PM) OIC, thx. Anway, I'm almost finished with 939. Going to go 775 soon!  Woah, durian runtuh ar ? |
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Jun 27 2007, 11:44 PM
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Senior Member
3,807 posts Joined: Jan 2003
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Changed my mobo to abit kn8...
now orthosing at 2.6Ghz with ctock vcore... Seems like better than my gigabyte...  Added on June 28, 2007, 12:03 amdamn, i cant even reach 2.7Ghz.... even i pump vcore till 1.5v... now orthising with 2.65Ghz with default vcore... the temp seems nice... So, 2.7 is my limit ady....  This post has been edited by amyhs99: Jun 28 2007, 12:03 AM |
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Jun 28 2007, 01:54 AM
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Senior Member
2,471 posts Joined: Jan 2003
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QUOTE(uzairi @ Jun 24 2007, 09:25 PM) , currently im using 2.7v for my tccd. Should i increase the vdimm ? |
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Jun 28 2007, 01:21 PM
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Elite
14,576 posts Joined: May 2006 From: Sarawak
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QUOTE(uzairi @ Jun 24 2007, 09:25 PM) Woah, durian runtuh ar ? |
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Jun 28 2007, 01:57 PM
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Senior Member
2,471 posts Joined: Jan 2003
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QUOTE(kmarc @ Jun 28 2007, 01:21 PM) Ye la. Kan pihak kerajaan bagi naik gaji! you're so lucky man  btw, LCB9E should be a nice stepping, someone from XS got opty 170 LCB9E 0704 batch and it's doing very well, 3.0GHz @ stock vcore.  |
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Jun 28 2007, 03:08 PM
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Senior Member
6,744 posts Joined: Jan 2003 From: World Wide Web Status: Banned
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QUOTE(amyhs99 @ Jun 27 2007, 11:44 PM) Changed my mobo to abit kn8... Mine max out at 2.62ghz, is it the mobo's limit ? now orthosing at 2.6Ghz with ctock vcore... Seems like better than my gigabyte... Added on June 28, 2007, 12:03 amdamn, i cant even reach 2.7Ghz.... even i pump vcore till 1.5v... now orthising with 2.65Ghz with default vcore... the temp seems nice... So, 2.7 is my limit ady.... QUOTE(gsan @ Jun 28 2007, 01:54 AM) you can raise it up to 2.9v provided you have proper cooling to it. Ya, proper cooling on it and slightly warm only. I can do 282mhz on 2.7v currently and i supposed i already reached mobo's limitations. |
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Aug 15 2007, 12:59 PM
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Senior Member
1,058 posts Joined: Apr 2006 From: Penang , Malaysia
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some of my OC with my Opty 170.
just 3Dmark06 with OC. This post has been edited by overclockalbert: Aug 17 2007, 03:24 AM |
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Aug 20 2007, 06:27 PM
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Senior Member
2,295 posts Joined: Jan 2005 From: Penang
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Bought this steppings of x2 3800+, CCBWE 0552SPMW
AMD Athlon 64 X2 3800+ Toledo CCBWE 0552 SPMW @ 2.8GHz w/ Apogee GT waterblock vcore 1.47v DFI UT LP NF4 SLI Expert w/ Evercool VC-RE vLDT 1.3v | vNB 1.68v 256Mb DDR3 ASUS X1950XT @ Core: 702Mhz Memory: 2000Mhz 2x1GB Infineon CE-5 - 254 @ 3-3-3-8, vdimm 2.74v Acbel IPower 550Watt PSU Cooling System: Swiftech Apogee GT Waterblock Swiftech MCP-650 Pump(D4) Swiftech MCR-220-QP Radiator Swiftech Micro Reservoir Aquaxtreme MP-01 VGA Wateblock Gigabyte GBT-Coolant 1/2 ID tubings. This post has been edited by lichyetan: Aug 22 2007, 01:03 AM Attached thumbnail(s) 
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Sep 3 2007, 06:31 PM
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Senior Member
1,747 posts Joined: Nov 2004 From: serdang selangor 
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 CPU : AMD X2 3800 (2.7GHz @ 9x300MHz = 1.536V) Core : Toledo E6 Socket : S939 RAM : 2 x 512MB Team Extreem Hermes DDR600(2.5-4-4-8, 2.80V) M/B : Abit KN8 Ultra PSU : Cooler Master Real Power 450W Cooling : Cooler Master HSF (air) can run 300mhz x 10 multiplier but no so stable sorry soulfly for not including the prime test will update later when got time |
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